Antifreeze container



March 6, 1928.

W. W. AYRE ANTIFREEZE CONTAINER Filed March 17, 1927 WILLIAM W AYRE[NIL/'TZVTOR. f

A TTORNbYS.

Patented Mar. 6, 1928.

PATENT OFFICE.

WILLIAM 'W. AYBE, OF WEST ENGLEWOOD, NEW JERSEY.

ANTIFREEZE CONTAINER.

Application filed March 17, 1927. Serial No. 176,187.

My invention relates particularly to automatic means for preventingbottles of milk and similar articles, when left outside for coolingpurposes, from freezing when the temperature falls below the freezingpoint.

To this end \my invention consists primarily of. a container to hold thebottle of milk or other article, an electric heating resistant in saidcontainer, and novel means whereby when the article is placed in thecontainer the heater will be automatically placed in the electriccircuit, will be automatically vitalized to keep the article fromfreezing when the temperature falls below the freezing point, will beautomatically devitalized when the temperature rises above the freezingpoint, so as not to warm the article unduly, and will be automaticallycut off from the electric circuit when there is no article in thecontainer so as not to waste current.

In order that my' invention may be fully understood I will firstdescribe in detail the mode in which I at present prefer to carry theinvention into practice and particularly point out the invention in theclaim.

Reference is to be had to the accompanying drawing, forming part of thisapplication, in which the figure is a perspective view an showing ananti-freeze container embodying v my invention.

Inthe drawing, 1 designates a container having a lid 2 to give accessthereto, 3 designates a non-heat conducting insulation with which thecontainer is preferably lined to retain natural warmth in the container,when closed, as far as possible. In the bottom of the container-isarranged a perforated horizontal shelf 4 on which the 40 bottles of milkor other articles sensitive to freezing are placed, and below thereticulated shelf 4 is arranged, preferably parallel thereto, anelectric heating grid 5 of any usual or desired resistant material,which is to be connected with an ordinary electric circuit 6, includingand regulated automatically by a thermostatic circuit closer 7, fittedwithin the container.

To keep the circuit 0 en only when an article is contained therein, Iprefer to hin e the shelf 4 at one end to'the end wall of t e container,so that its free ehd can swing vertically between a stop 8 above it anda circuit closer 9, in the circuit, arranged in a shoulder lO beneaththe free end of the shelf, and provide a spring 11 beneath the free endof the shelf to hold the shelf, when not weighted with any article, awayfrom the circuit closer 9 against the upper stop 8, and thus cuted andsave all current when the container is not in use.

When a bottle of milk or other like article is placed on the shelf, itsweight will depress the shelf against the spring 11, close the circuit,and vitalize the heater 5, and warm the interior of the containersufliciently to keep the sensitive article from freezing.

To cut off the current and devitalize the heater, when the temperaturein the container rises materially above the freezing point,

the thermostatic circuit closer 7 is adjusted to open the circuit whenthe temperature rises too high for the good of the contained article,and to close the circuit again when the temperature falls below..,thefreezing point. I

Milk or any other article sensitive to temperature can by this means hekept automati cally as cool as desired, without any chance of freezing.

It is evident that the specific details of my invention herein shown anddescribed, may be greatly varied without departing from the boundariesof my invention as defined by the following claim.

I claim as my invention Anti-freeze apparatus comprising a container andmeans for closing the same against theadmission of air, an electricc1r-' cuit, a circuit closer, means whereby the circuit closer isautomatically operated by an article placed in the container, and athermostatic circuit closer in said circuit arranged to break thecircuit when the temperature in the container rises to a predeterminedpoint,

and to close the circuit when the temperature of the closed containerfalls to a predetermined point.

In testimony whereof he aflixes his slgnature.

WILLIAM W. AYRE.

